Self-cleaning burner for fluid combustibles



W. H, CHADICK. SELF CL'EANING'BURNER FOR FLUID COMBUSTIBLES.

Y APPLICATION FILED-MAR. 29. 1919. 1,367,947. Patentgd Feb. 8, 1921.

WITNESSES 4 INVENTOR (14mm ./l. 66 m ATTORNEYS WILLIAM H. CHADICK, 0FSUFFERN, NEW YORK.

SELF-CLEAN IN G BURNER FOR FLUID COMBUSTIBLES.

Application filed March 29, 1919.

1 0 all whom it may concern:

Be it known that I, WILLIAM H. UHADIOK, a citizen of the United States,and residing at Sutfern, county of Rockland, and State of New York, haveinvented certain new and useful Improvements in Self-Cleaning Burnersfor Fluid Combustibles, of which the following is a full and clearspecification, illustrated in the annexed drawings.

The particular novel features of my invention are more fully pointed outin the annexed claims.

My invention relates to burners of the particular kind in whichhydrocarbon oils and gases are used as fuel, and particularly to a typeof burners used in steam propelled automobiles or the like, whether thefuel is delivered under pressure, or otherwise.

The hydrocarbon oils such, for instance, as gasolene used for the abovementioned purpose, have the disadvantage of sooting up the orifices atwhich the flame is formed and also of causing the ducts in which th fuelis evaporated to easily become clogged. The purpose of my invention isto automatically clean these ducts and orifices every time the burner islighted and extinguished so that at no time large amounts of impuritiescan collect.

In the accompanying drawings, Figure 1 illustrates a longitudinalvertical section of the type of burner referred to. Fig. 2 illustratesin detail a portion of the scraper rod used in the fluid duct, and Fig.3 is a longitudinal vertical section of a portion of the fluid supplyduct showing certain detail arrangements.

Referring to Fig. 1, 1 represents the base on which the burner casing 2is suitably mounted. Fuel supply duct 3 enters the burner at one endwhere an air mixing device 3"* is provided, which may be of any suitableconstruction. The supply duct 3 is connected to the fuel main 4: asshown.

The burner 2 1s provided at its upper side with orifices 5, 5 which maybe oblong or rec tangular so that scraping members 6, one of which isdisposed in each orifice, are able to move'in these orifices and scrapealong the walls thereof. vScraping members 6 are all connected andfastened to a common rod 7 which is slidingly disposed in the burnercasing 2, by having its inner end disposed in a guide boss 8 and itsouter end protruding through a stufiing box 9 for the purpose to bereferred to hereinafter.

Specification of Letters Patent.

Patented Feb. 8, 1921.

Serial No. 285,981.

In the fuel supply duct 3, a rod 10 is disposed on which are mountedradially ex tending pins 11 of suitable length so as to touch the innerwall of duct 8. The inner end of scraper rod 10 is centrally supportedby a cross 12 shown in detail in Fig. 2, and the outer end of rod 10 isguided in a stuiiing box 13. On a suitably shaped arm 14- is pivoted a.double lever 15 one end of which is pivotally attached at 16 to thescraper rod 10, its other end being pivotally attached at 17 to theouter end of rod 7, as is shown in Fig. 3. One of the pins 21 of scraperrod 10 engages in a helical groove 22 provided in the inner wall of duct3 so that when rod 10 is moved back and forth longitudinally, it iscompelled at the same time to perform an oscillating motion on itslongitudinal axis. In order to enable rod-10 to thus oscillate, a swiveljoint 23 is interposed between the rod and the pivotal oint 16.

At the rear end of burner 2 is provided an upright boss 18 in which isfixed one end of a thermostat rod 19, the other end of this rod beingpivotally attached at to lever 15. Thermostat rod 19 is disposed on theburner casing 2 so that it is exposed to the heat-of the flamesemanating from orifices 5. I

The operation of the device is as follows: So long as the burner is coolthe several elements of the device described may be assumed in theposition shown in Fig. 1, in which for instance, the scraping members 6which are located in orifices 5 are then at the right hand end of theorifices. At this time, thermostat rod 19 is contracted and rigidlyholds the scraping members 6 and also scraper rod lOwith its pins in theposition shown. If the burner is lighted, or otherwise heated, the heatof the flames emanating from orifices 5 will expand thermostat 19 sothat this rod, in lengthening, moves the up per half of lever 15 to theright and the lower half to the left, which causes scraping members 6 tomove to the other end of their respective orifices, and rod 10 to moveoutwardly, thereby oscillating on its own axis by virtue of spiralgroove 22 as described before. /Vhen rod 10 thus moves, its scrapingpins 11 scrape along the inner wall of the duct 8 and hold it free fromdeposits which might form thereon. Scraping members 6 remove, by theirmoving to the left, any soot which might have formed on the walls of theorifices 5. The entire scraping device re mains in this position as longas the burner is lighted. Then the burner is extinguished, thermostatrod 19 contracts and moves the two scraping devices in the otherdirection whereby their respective scraping members clean the orificesor walls from any deposits which might have formed during the operationof the burner.

The deposits, which are removed from orifices 5 in the manner describedbefore, will fall into the burner casing 2, whence they may be removedfrom time to time by means of a steam jet emanating from a steam pipe25, terminating close to the bottom of casing 2. Pipe 25 may beconnected to the boiler or any other suitable steam supply. A dischargegate 26 is provided the opposite end of the burner casing and normallyclosed by a hinged shutter 27. lVhen the steam is turned on, shutter 27is opened and the dcposits are blown out oi the casing.

W'hat I claim is:

1. In a burner of the character described having -fuel ducts, carbonscraping members located in said ducts, and a thermostat exposed to theheat produced by the burner, and suitably connected to said scrapingmembers for moving the same in said ducts in a predetermined directionwhen the thermostat is expanded during the operation of the burner andfor moving said members in the opposite direction when the burner coolsoff and the thermostat is contracted.

2. In a burner of the character described having a fuel duct andorifices in the wall oi the burner at which the flames are formed,scraping members located in said orifices and adapted to move therein toremove combustion deposits therefrom, and a thermostat taming a scraperrod having scrapingexposed to the heat of the flames and suitablyconnected to said scraping members to more same in one direction whenthe thermostat .is expanded by the heat and to move said members in theopposite direction when the burner cools oil and the thermostat iscontracted.

8. In a burner oi the character described a fuel discharge compartmenthaving orifices in its wall at which the flames are formed, a scraping,member located in each orifice and adapted to move therein to removecombus 1-- 11 ture and ha 'ing one end pivotally connected to saidscraper rod and the other end pivotally connected to said common rod ofthe discharge compartment, a thermostat rod ex posed to the heat of theburner and fixed at one end to the burner structure and pivot-allyattached at its other end to said lever, said thermostat causing saidlever to rock in one direction when it is expanded by the heat and torock in the other direction when the thermostat contracts through.thecoolin cit of the burner, the rocking of said lever causing saidscraper pins and scraping members to operate.

- -WILLIAM H. CHADICK.

